Ohio Census 2020 Redistricting Blocks

This layer contains block level 2020 Decennial Census redistricting data as reported by the U.S. Census Bureau for the state of Ohio. The attributes come from the 2020 Public Law 94-171 (P.L. 94-171) tables. Data download date: August 12, 2021 Census tables: P1, P2, P3, P4, H1, P5, Header Downloaded from: Census FTP site Processing Notes: Data was downloaded from the U.S. Census Bureau FTP site, imported into SAS format and joined to the 2020 TIGER boundaries. Boundaries are sourced from the 2020 TIGER/Line Geodatabases. Boundaries have been projected into Web Mercator and each attribute has been given a clear descriptive alias name. No alterations have been made to the vertices of the data. Each attribute maintains it's specified name from Census, but also has a descriptive alias name and long description derived from the technical documentation provided by the Census. For a detailed list of the attributes contained in this layer, view the Data tab and select "Fields". The following alterations have been made to the tabular data: Joined all tables to create one wide attribute table: P1 - Race P2 - Hispanic or Latino, and not Hispanic or Latino by Race P3 - Race for the Population 18 Years and Over P4 - Hispanic or Latino, and not Hispanic or Latino by Race for the Population 18 Years and Over H1 - Occupancy Status (Housing) P5 - Group Quarters Population by Group Quarters Type (correctional institutions, juvenile facilities, nursing facilities/skilled nursing, college/university student housing, military quarters, etc.) Header After joining, dropped fields: FILEID, STUSAB, CHARITER, CIFSN, LOGRECNO, GEOVAR, GEOCOMP, LSADC. GEOCOMP was renamed to GEOID and moved be the first column in the table, the original GEOID was dropped. Placeholder fields for future legislative districts have been dropped: CD118, CD119, CD120, CD121, SLDU22, SLDU24, SLDU26, SLDU28, SLDL22, SLDL24 SLDL26, SLDL28. P0020001 was dropped, as it is duplicative of P0010001. Similarly, P0040001 was dropped, as it is duplicative of P0030001. In addition to calculated fields, County_Name and State_Name were added. The following calculated fields have been added (see long field descriptions in the Data tab for formulas used): PCT_P0030001: Percent of Population 18 Years and Over PCT_P0020002: Percent Hispanic or Latino PCT_P0020005: Percent White alone, not Hispanic or Latino PCT_P0020006: Percent Black or African American alone, not Hispanic or Latino PCT_P0020007: Percent American Indian and Alaska Native alone, not Hispanic or Latino PCT_P0020008: Percent Asian alone, Not Hispanic or Latino PCT_P0020009: Percent Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino PCT_P0020010: Percent Some Other Race alone, not Hispanic or Latino PCT_P0020011: Percent Population of Two or More Races, not Hispanic or Latino PCT_H0010002: Percent of Housing Units that are Occupied PCT_H0010003: Percent of Housing Units that are Vacant Please note these percentages might look strange at the individual block level, since this data has been protected using differential privacy.* *To protect the privacy and confidentiality of respondents, data has been protected using differential privacy techniques by the U.S. Census Bureau. This means that some individual blocks will have values that are inconsistent or improbable. However, when aggregated up, these issues become minimized. The pop-up on this layer uses Arcade to display aggregated values for the surrounding area rather than values for the block itself. Additional links: U.S. Census Bureau U.S. Census Bureau Decennial Census About the 2020 Census 2020 Census 2020 Census data quality Decennial Census P.L. 94-171 Redistricting Data Program

本图层包含由美国人口普查局（U.S. Census Bureau）发布的俄亥俄州（Ohio）2020年十年一次人口普查街区级重划选区数据。其属性源自2020年《公法94-171》（Public Law 94-171，P.L. 94-171）表格。数据下载日期：2021年8月12日；所用普查表格包括P1、P2、P3、P4、H1、P5及表头（Header），下载来源为普查局FTP站点。

处理说明：数据从美国人口普查局FTP站点下载后，导入为SAS格式，并与2020年TIGER/Line地理数据库（TIGER/Line Geodatabases）的边界数据进行关联。边界数据已被投影至Web墨卡托投影（Web Mercator），每个属性均已配置清晰的描述性别名。未对数据的顶点进行任何修改，所有属性保留普查局指定的原始名称，同时增设了源自普查局技术文档的描述性别名与详细说明。如需查看本图层包含的属性详细列表，请切换至"数据"选项卡并选择"字段"。

以下为表格数据的调整操作：将所有表格合并为一个宽属性表，各表格对应内容如下：P1为种族数据；P2为按种族划分的西班牙裔或拉丁裔、非西班牙裔或拉丁裔人口数据；P3为18岁及以上人口种族数据；P4为按种族划分的18岁及以上人口的西班牙裔或拉丁裔、非西班牙裔或拉丁裔人口数据；H1为住房占用状态数据；P5为按集体户类型划分的集体户人口数据（涵盖惩教机构、青少年管教设施、护理院/专业护理机构、大学/院校学生宿舍、军事驻地等）。

合并后删除的字段包括：FILEID、STUSAB、CHARITER、CIFSN、LOGRECNO、GEOVAR、GEOCOMP、LSADC。将GEOCOMP重命名为GEOID并设为表格首列，同时删除原始GEOID字段。删除预留未来立法选区的占位字段：CD118、CD119、CD120、CD121、SLDU22、SLDU24、SLDU26、SLDU28、SLDL22、SLDL24、SLDL26、SLDL28。删除重复字段P0020001（与P0010001重复）及P0040001（与P0030001重复）。除计算字段外，额外新增County_Name（县名）与State_Name（州名）字段。

以下为新增的计算字段（具体计算公式详见"数据"选项卡的字段详细说明）：PCT_P0030001：18岁及以上人口占比；PCT_P0020002：西班牙裔或拉丁裔人口占比；PCT_P0020005：非西班牙裔或拉丁裔的白人单独人口占比；PCT_P0020006：非西班牙裔或拉丁裔的黑人或非裔美国人单独人口占比；PCT_P0020007：非西班牙裔或拉丁裔的美国印第安人及阿拉斯加原住民单独人口占比；PCT_P0020008：非西班牙裔或拉丁裔的亚裔单独人口占比；PCT_P0020009：非西班牙裔或拉丁裔的夏威夷原住民及其他太平洋岛民单独人口占比；PCT_P0020010：非西班牙裔或拉丁裔的其他种族单独人口占比；PCT_P0020011：非西班牙裔或拉丁裔的多族裔人口占比；PCT_H0010002：已占用住房单元占比；PCT_H0010003：空置住房单元占比。

请注意，由于美国人口普查局采用差分隐私（differential privacy）技术保护受访者的隐私与机密性，单个街区的占比数值可能出现异常。*由于美国人口普查局采用差分隐私技术保护受访者的隐私与机密性，部分单个街区的数值可能存在不一致或不合理的情况。但在汇总至更高层级区域后，此类问题将大幅缓解。本图层的弹窗采用Arcade脚本显示周边区域的汇总值，而非单个街区的原始数值。

附加链接：美国人口普查局（U.S. Census Bureau）、美国人口普查局十年一次人口普查、2020年人口普查简介、2020年人口普查、2020年人口普查数据质量、十年一次人口普查P.L. 94-171重划选区数据项目